Waterproof matches, decent camping stove (and fuel), flashlight and spare batteries (maybe glow sticks for no heat leat and no batteries)
Mobile phone, warm blankets, first aid kit, change of socks, wet feet are horrible.
Hmm thinking about it depedns if you are hiking and want to pack light, or if your are doi ng a survivel type camping thing or doing what I do which is fill up the car with lods of stuff (seats, blankets, pillows, beer, food, change of cloths etc) and eat and drink out in the wilds....